/Engine/Plugins/FX/Niagara/Source/NiagaraEditor/Public/NiagaraActions.h
void AddAction ( [TSharedPtr](API\Runtime\Core\Templates\TSharedPtr)< [FNiagaraMenuAction](API\Plugins\NiagaraEditor\FNiagaraMenuAction) > Action, int32 SortOrder, const [FString](API\Runtime\Core\Containers\FString) & Category )